fix: network params ethereum package

Author: MarcosNicolau

network_params.yaml

@@ -66,7 +66,23 @@ network_params:
   #  (9) 0xa0Ee7A142d267C1f36714E4a8F75612F20a79720 --> (9) 0x2a871d0798f97d79848a013d4936a73bf4cc922c825d33c1cf7073dff6d409c6
   #
   # Note: The json can not contain any comments
-  prefunded_accounts: '{
+  prefunded_accounts:
+    '{
+      "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266": { "balance": "100000000000000ETH" },
+      "0x70997970C51812dc3A010C7d01b50e0d17dc79C8": { "balance": "100000000000000ETH" },
+      "0x3C44CdDdB6a900fa2b585dd299e03d12FA4293BC": { "balance": "100000000000000ETH" },
+      "0x90F79bf6EB2c4f870365E785982E1f101E93b906": { "balance": "100000000000000ETH" },
+      "0x15d34AAf54267DB7D7c367839AAf71A00a2C6A65": { "balance": "100000000000000ETH" },
+      "0x9965507D1a55bcC2695C58ba16FB37d819B0A4dc": { "balance": "100000000000000ETH" },
+      "0x976EA74026E726554dB657fA54763abd0C3a0aa9": { "balance": "100000000000000ETH" },
+      "0x14dC79964da2C08b23698B3D3cc7Ca32193d9955": { "balance": "100000000000000ETH" },
+      "0x23618e81E3f5cdF7f54C3d65f7FBc0aBf5B21E8f": { "balance": "100000000000000ETH" },
+      "0xa0Ee7A142d267C1f36714E4a8F75612F20a79720": { "balance": "100000000000000ETH" },
+    }'
+
+  # Preloaded contracts for the chain
+  additional_preloaded_contracts:
+    '{
       "0x0165878a594ca255338adfa4d48449f69242eb8f": {
         "nonce": 1,
         "balance": "0x0",